linux-kernel - [PATCH 2/2] samples/livepatch: Add README.rst disclaimer

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Date:   Tue, 21 Jul 2020 12:14:07 -0400
From:   Joe Lawrence <joe.lawrence@...hat.com>
To:     live-patching@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] samples/livepatch: Add README.rst disclaimer

The livepatch samples aren't very careful with respect to compiler
IPA-optimization of target kernel functions.

Add a quick disclaimer and pointer to the compiler-considerations.rst
file to warn readers.

Suggested-by: Josh Poimboeuf <jpoimboe@...hat.com>
Signed-off-by: Joe Lawrence <joe.lawrence@...hat.com>
---
 samples/livepatch/README.rst | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 samples/livepatch/README.rst

diff --git a/samples/livepatch/README.rst b/samples/livepatch/README.rst
new file mode 100644
index 000000000000..2f8ef945f2ac
--- /dev/null
+++ b/samples/livepatch/README.rst
@@ -0,0 +1,15 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+==========
+Disclaimer
+==========
+
+The livepatch sample programs were written with idealized compiler
+output in mind. That is to say that they do not consider ways in which
+optimization may transform target kernel functions.
+
+The samples present only a simple API demonstration and should not be
+considered completely safe.
+
+See the Documentation/livepatching/compiler-considerations.rst file for
+more details on compiler optimizations and how they affect livepatching.
-- 
2.21.3